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<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>标签列表</title>
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<style>
  .tags {
    border: 1px solid #c9e1f4;
    margin: 0;
    padding: 1em;
    list-style: none;

  }

  .tags li {
    display: inline-block;
    margin: .5em;
  }

  .tags a {
    position: relative;
    display: block;
    padding: .25em .5em .25em .25em;
    background-color: #c9e1f4;
    color: #28448f;
    border-radius: 0 .25em .25em 0;
    line-height: 1.5;
    text-decoration: none;
    text-align: center;
  }

  .tags a:before {
    position: absolute;
    content: '';
    width: 0;
    height: 0;
    border: 1em solid transparent;
    border-right-width: .5em;
    border-right-color: #c9e1f4;
    left: -1.5em;
    top: 0;


  }
</style>

<body>
  <ul class="tags">
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary p</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary pla</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary plaet</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary plnet</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">nary plane</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BIna planet</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary net</a></li>
    <li><a href="">BInary planet</a></li>
    <li><a href="">BInary planet</a></li>
  </ul>
</body>

</html>